"Organic" search engine marketing (organic search listings) combines the best practices of creativity, technology, usability, copy, and online promotion / PR. This is because many search engines base their relevancy algorithms on a combination of the text they see on a page, site, video, or image and combine the content information with external elements such as links and user behaviors/preferences demonstrated over time for a domain, content source, or specific content element.
In addition to measuring your website traffic, you need to track your conversion rates. For example, if, as a result of your search engine marketing efforts, your traffic doubles from 250 to 500 visitors per month, how many new customers did you acquire from the additional 250 visitors to your site? Do you now have twice as many customers as you did before? If you picked up 5 customers your conversion rate would be 2 percent of the new traffic (5 divided by 250) and 1 percent (5 of 500) overall.